decide [di'said] v 決定 determine make up one’s mind 裁決
decide to do sth 決定做某事 decide on sth 決定某事
e.g. i decide to travel this week !
decision [di'siʒən] n 決定，決心 make a decision 做出決定，下決心
declare [di'klɛə] v 1 宣告 宣布 2 聲明，斷言 3 申報（納稅物品）
declare for 表明贊成（擁護） declare against 表示反對
e.g. i declare this meeting open.
declaration [,deklə'reiʃən] n 1 宣言，公告 2 聲明，申報
decline [di'klain] v 1 減少, 下降 fall drop descend [di'send] 2拒絕 refuse reject 3 衰落 deteriorate [di'tiəriəreit]
n 1衰退 2 斜坡
decline to do sth /decline doing sth 拒絕做某事
e.g. our clients 客戶decline to raise提高 their price.
decrease [di:'kri:s] v 減少 reduce cut down 減弱 降低 n 減少，減弱，降低
decrease to ----- 減少到---- decrease by ----- 減少了----
e.g. we should decrease the use of water. 用水量
dedicate ['dedikeit] v 奉獻 devote , commit
dedicate---- to 1 題獻詞 2 把（時間，力量等）用于----
dedicate one’s life to ---- 獻身于-----
be dedicated to ----- 致力于----
e.g. she dedicated her life to science.
deep [di:p] adj 1 深的，深奧的 2 強烈的 adv 深深地
deeply ['di:pli] adv 1 深深地，非常地 2 深地 3 （顏色）深濃地 （聲音）低沉地
be deep in thought 沉思著 deep feeling 強烈地感受
e.g. he is very deep into computers.
defeat [di'fi:t] n/ v 擊敗 戰勝 beat , win over
suffer a defeat 遭受挫敗
e.g. he was depressed沮喪 by his defeat.
define [di'fain] v 1 解釋 給---下定義 2 限定
difine---as---- 把---定義為-----
e.g. he would never define himself as the most successful businessman.
definition [,defi'niʃən] n 1 定義，2限定
definite ['definit] adj 1 明確的，specifie ,clear 2 肯定的 positive sure
e.g. liquids have no definite shape.
degree [di'gri:] n 度數 程度 學位
to a degree 有點 ，稍微 in some degree 在某種程度上
to a certain degree 在一定程度上
e.g. water freezes 結冰at zero degree.
delay [di'lei] v/n 推遲 postpone defer put off 耽誤
without delay 趕快，立刻 delay time 延遲時間，滯后時間
e.g. time flies away without delay. 時光飛去不停留。